[en] Based on the Bardeen Cooper Schrieffer (BCS) theory of superconductivity, the coherent splitting of Cooper pairs from a superconductor to two spatially separated quantum dots has been predicted to generate nonlocal pairs of entangled electrons. In order to test this hypothesis, we propose a scheme to transfer the spin state of a split Cooper pair onto the polarization state of a pair of optical photons. We show that the produced photon pairs can be used to violate a Bell inequality, unambiguously demonstrating the entanglement of the split Cooper pairs.
Disciplines :
Physics
Author, co-author :
Nigg, Simon E.
Tiwari, Rakesh P.
Walter, Stefan
Schmidt, Thomas ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit ; University of Basel > Department of Physics
External co-authors :
yes
Language :
English
Title :
Detecting nonlocal Cooper pair entanglement by optical Bell inequality violation
Publication date :
2015
Journal title :
Physical Review. B, Condensed Matter
ISSN :
1095-3795
Publisher :
American Institute of Physics, New York, United States - New York